| 摘要 |
PROBLEM TO BE SOLVED: To provide an opening/closing device for an opening that may eliminate a difficulty in manual operation by an operator, and may perform specific opening/closing operation for an opening by using a plurality of blades, through a specific manual operation by the operator.SOLUTION: A blind device 1 includes: a plurality of blades 9 lined up next to each other in a vertical direction V at an opening 8, to be lifted/lowered on the opening 8 for opening/closing the opening 8; a link mechanism 10 connecting the blades 9 so that the blades may come close to or separate from each other freely; a reactive force generation mechanism 11 generating reactive force F that increases/decreases to suit a change in the number of blades 9 lifted/lowered on the opening 8; and a travel mechanism 14 that causes flexible long bodies 12 and 13 of the reactive force generation mechanism 11 to travel so that the opening 8 is closed/opened by the plurality of blades 9 when the lowermost blade 9 is lifted/lowered.SELECTED DRAWING: Figure 1 |
